The Australian-born royal, 52, was seen with her husband King Frederik at the funeral of former court chief Per Thornit at the Holmens Church in Copenhagen.
She wore a beautiful black satin blouse from Jesper Hovring with long sleeves which was paired with a midi pleated black skirt.
The skirt was nipped in at the waist with the 'Small Block Triomphe Black Smooth Calfskin Belt' from Celine and her look was elevated further with a pair of black pointed-toe stilettos - the 'Ascent 85' style from Gianvito Rossi which happens to be a staple brand for Meghan Markle and the Princess of Wales.
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The mother-of-four made a statement with a wide-brimmed black hat from Susanne Juul and decided to go without a bag.
Rounding off Mary's look were her go-to understated gold jewels - the eight-carat gold 'Petite Letter Necklace' with initial 'F' of her husband from Halberstadt and the 'Vega Relief' gold necklace from Dulong.
King Frederik's wife's brunette tresses were styled in a straight blow-dry and her makeup was pristine, featuring a smokey eye.
Mary also wore a flesh-toned plaster on her chin following an unexplained facial injury.
Queen Mary's Parisian style
Prior to the royal's sombre outing, she was spotted rocking several stylish looks at the Paris Olympics. On 2 August, she attended the men's tennis semifinal match between Carlos Alcaraz of Spain and Felix Auger Aliassime of Canada where she rocked a chic pair of white trousers.
She teamed the unexpectedly casual trews with the 'Brooket' shirt from Bagutta in pale blue. The shirt was tucked into the Rabens Saloner trousers and cinched with a tan and white belt.
Finishing off her look was a pair of tan sliders from Hermes, a Chloe crossbody bag, and Gucci sunglasses.
Meanwhile, she looked pristine at the swimming night session on day five in a floaty printed skirt from Ganni and a white shirt complete with vintage leather gladiator sandals from Prada.
She swapped her light shirt for a sleeveless white top when she re-wore the designer skirt the following day to the Artistic Gymnastics Women's All-Around Final alongside friends Malou Skeel and Helle Trolle.
Her most accomplished look of the events featured a red Jesper Hovring blouse with white wide-leg trousers and tan accessories as she was greeted by French President Emmanuel Macron and his wife Brigitte at a reception for foreign leaders prior to the Olympics Opening Ceremony at Élysée Palace.
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